I don't want to add copper when a fish isn't eating. I've always felt proper nutrition is the key first and everything else is secondary, unless dealing with Velvet. Right now there are no signs of that with any of the fish. The YBR is still flashing and scratching its gills. I'm mixing up Focus & Metro now.Not necessarily. But I don’t think going a little hypo would be too bad either. I may just be the “throwing it at the wall, and seeing what sticks” strategy.
The issue could be stress, neurological, or a bug. If it is a bug, going hypo may help, depending on what type of bug. But so would copper. Both approaches add their own risks, stress, and benefits.
The fish should be fine down to 1.015 with minimal additional stress. Any marine bugs won’t like this. Going lower is when you may start to add stress to the fish.
If the Kole doesn't eat by the afternoon I'll give it a half hour methylene blue bath in hypo and go from there. At least it's not swimming in circles anymore.
Thanks for your opinion!